Wtf?!

So I was at the music store today trying to get a new set of strings for my guitar,the dude at the store asked me what kind of strings I wanted. I told him I wanted the acoustic strings set. 0.1. Then this dude goes,"Would you like the entire set?" I was like erm....yes.... And he kept asking if I wanted a whole set over and over. I was getting annoyed but then,my husband came by and told the dude what we wanted. So we just paid and left. It was weird. I said I wanted a whole set of strings. Which part of that did he not get?